| Autor: |
Celani, F., Marini, P., Di Stefano, V., Spallone, A., Nakamura, M., Purchi, E., Calamai, O. M., Andreassi, V., Righi, E., Trenta, G., Marmigi, A., Cappuccio, G., Dariush Hampai, Todarello, F., Mastromatteo, U., Mancini, A., Falcioni, F., Marchesini, M., Di Biagio, P., Martini, U., Sona, P. G., Fontana, F., Gamberale, L., Garbelli, D. |
| Jazyk: |
angličtina |
| Rok vydání: |
2009 |
| Zdroj: |
Scopus-Elsevier |
| DOI: |
10.15161/oar.it/1448969588.42 |
| Popis: |
Large excess heat is measured in a Pd wire coated with nano-particles. A long (65 cm) and thin (50 μm) Pd wire is coated with thin layers of Pd nano-particles, stabilized against self-sintering by the addition of selected chemical elements: the coating is adhered to the wire surface by heating it in air up to about 800°C. The wire is then heated with up to 1 A of direct current in a pressurized D2 gas atmosphere. The D+ deuterons in the Pd lattice are forced to move toward the cathodic end of the wire because of the voltage drop along the wire (the Cöhn effect). Large excess power density (about 400 W/g of Pd), at high temperatures (up to 400-500°C), is then measured using isoperibolic calorimetry. The reference experiment is made, in situ and without opening the cell, using a Pt wire of same dimensions as the Pd wire, to which was applied the same electrical power. The onset of excess heat occurs in during a phase change from an α + β combined phase of the Pd-D to the α phase, and is proportional to the current density, and to the corresponding voltage drop or input power applied, i.e. the Pd temperature. In the range of temperatures explored up to now, the excess power has exhibited “positive feedback” behaviour versus temperature. This may prove useful to developing future self-sustaining devices for practical applications. No anomalous effects were found using 4He (or Ar, or dry-air) gases. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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